Geocoder Parameters not Populating with Bing

Hi all,

I am having difficulty getting my Geocode activity to work with Bing. The behavior which I'm expecting is for the activity to re-populate with the required parameters of the service once I enter the url and hit "refresh," but the parameters aren't populating. Has anyone gotten this to work with Bing? I suspect that either I haven't gotten the authentication to work correctly, or maybe am using the wrong url entirely. I am trying to use "http://dev.virtualearth.net/REST/v1/Locations" as the geocoding service. Maybe there's something else afoot? The Bing geocoder does work a little differently in that the parameters are passed with the url to the service, and I wonder if that may toy with the way my workflow activity functions? I don't know. We're on 4.3.1 by the way. Thanks,

--Zack